rename classic mac build dir to macos/
rename classic mac build dir to macos/

svn path=/trunk/vorbis/; revision=3622

youfearm3/vorbis,erikd/vorbis,felipebetancur/vorbis,emscripten-ports/Vorbis,youfearm3/vorbis,ksophocleous/vorbis,ShiftMediaProject/vorbis,erikd/vorbis,youfearm3/vorbis,ShiftMediaProject/vorbis,mwgoldsmith/vorbis,ShiftMediaProject/vorbis,erikd/vorbis,eidy/vorbis,ShiftMediaProject/vorbis,felipebetancur/vorbis,ShiftMediaProject/vorbis,ksophocleous/vorbis,erikd/vorbis,felipebetancur/vorbis,eidy/vorbis,felipebetancur/vorbis,emscripten-ports/Vorbis,ksophocleous/vorbis,eidy/vorbis,youfearm3/vorbis,mwgoldsmith/vorbis,ksophocleous/vorbis,mwgoldsmith/vorbis,nicolaichuk/vorbis,nicolaichuk/vorbis,nicolaichuk/vorbis,mwgoldsmith/vorbis,ShiftMediaProject/vorbis,emscripten-ports/Vorbis,emscripten-ports/Vorbis,eidy/vorbis,nicolaichuk/vorbis